- 著者
- Kenji Hanada Takahiko Kinjo Hiroaki Yokoyama Michiko Tsushima Maiko Senoo Hiroaki Ichikawa Fumie Nishizaki Shuji Shibutani Takashi Yokota Ken Okumura Hirofumi Tomita
- 出版者
- The Japanese Circulation Society
- 雑誌
- Circulation Journal (ISSN:13469843)
- 巻号頁・発行日
- pp.CJ-23-0023, (Released:2023-09-28)
- 参考文献数
- 38
- 被引用文献数
- 2
Background: The characteristics and clinical outcomes associated with sustained ventricular tachycardia and fibrillation (VT/VF) in Japanese acute myocardial infarction (AMI) patients remain unknown.Methods and Results: Consecutive AMI patients (n=1,941) transferred to the Hirosaki University Hospital and treated with primary percutaneous coronary intervention (PCI) within 12 h of onset were retrospectively studied. The incidence of VT/VF during hospitalization was 8.3%, and 75% of cases occurred by the end of PCI. Independent predictors associated with VT/VF occurrence by the end of PCI and after PCI, respectively, were identified. Additionally, the differences between patients with VT and VF were examined, which revealed that the characteristics of patients and predictors for VT and VF were clearly different. Additionally, the QRS duration during VT was measured, which demonstrated the possible involvement of Purkinje fibers for VT in the acute phase of AMI. Of the patients with VT/VF, 12% required ECMO support due to refractory VT/VF despite intravenous antiarrhythmic agents such as β-blockers, amiodarone, and nifekalant. Among the patients discharged alive, 1,690 were followed up for a mean of 3.7 years. VT/VF occurrence during hospitalization did not affect the mid-term clinical outcomes even in patients with VT.Conclusions: The results clearly indicated that VT/VF is still a serious complications of AMI. We need to identify patients at high risk of developing VT/VF for careful observation and appropriate intervention.
- 著者
- Hiroaki Ichikawa Masaharu Takanashi Shogo Sato Nobuyuki Iwata Hiroshi Yamamoto
- 出版者
- The Materials Research Society of Japan
- 雑誌
- Transactions of the Materials Research Society of Japan (ISSN:13823469)
- 巻号頁・発行日
- vol.37, no.4, pp.507-510, 2012-12-01 (Released:2013-12-07)
- 参考文献数
- 15
The purpose of this work is to study the electric properties of graphite and the synthesis of a few layers graphite intercalation compounds (GIC). First, intercalation of Li between graphite layers was done by soaking the substrates into a 20 ml n-butyllithium solution. Second, intercalation of FeCl3 into the graphite was done by heating FeCl3 powder and graphite in the quartz tube. For Li intercalation, the appearance of an extra Bragg reflection at 23.7º indicates that Li atoms were intercalated between the graphene sheets in the specimen we grew. For FeCl3 intercalation, the (00l) Bragg reflection was caused by the FeCl3-GIC. Probably Iron Chloride was intercalated in graphite. In the Raman spectra of graphite and FeCl3-GIC, the G, D and 2D peaks were confirmed. Additional peaks only in the specimen of FeCl3-GIC were observed at 1605 cm-1 and 3415 cm-1. It is speculated that the peak is related to the intercalation of FeCl3 into the graphite.